Mongos calls sharding-specific commands shardsvrDropCollection, shardsvrRenameCollection, shardsvrDropDatabase against the primary shard for the database.

However, mongoq needs to be deployed in front of non-shardsvr replica sets, so cannot call these shardsvr commands.

This ticket is to:

• Stop linking the existing cluster_drop_collection_cmd.cpp, cluster_rename_collection_cmd.cpp, and cluster_drop_database_cmd.cpp into mongoq
• Create new mongoq versions of dropCollection, renameCollection, and dropDatabase that directly forward the client's request to the primary shard for the database (perhaps following the pattern of cluster_convert_to_capped_cmd.cpp). We can move the nonShardedCollectionCommandPassthrough to cluster_commands_helpers.h/cpp so it can be called from all of the new command's files.
• Link the new mongoq versions of the commands into mongoq

This ticket depends on SERVER-61312, which will allow linking different commands in to mongoq than mongos.